The geological characteristics of the lime rock stratum of the Guangzhou Subway is introduced in the paper,which points out that when a shield is used for construction in lime rock stratum,karst and earth holes have to be pre-treated.
介绍了广州地铁石灰岩地层地质特征,提出盾构在此地层中施工要进行岩溶、土洞预处理,对掘进中出现的喷涌、盾构偏移、管片上浮等问题进行了原因分析并提出控制措施,对同类工程有参考价值。
A soft, porous limestone, composed essentially of fragments of shells and coral, used as a building material.
贝壳灰岩一种质软、多孔的灰岩，基本上由贝壳及珊瑚的碎片构成，用作建筑材料
caprinid biosparite
双壳类生物亮晶灰岩
Petworth marble
彩色的含有贝壳形迹的石灰石
The types of reservoirs main include base rock weathering crust, sandstone, tuffaceous sandstone and conglomerate.
储层类型主要包括基岩风化壳、岩、灰质砂岩和砾岩。
Deposition of Plate-Like Apatite on Nacre Surfaces and Its in Vitro Bioactivity
贝壳表面沉积片状磷灰石及其体外生物活性
Preparation of Hydroxyapatite(HAp)-Shell Sand De? uorinating Agent by Process of Metasomatic Crystallization
交代结晶法制备羟基磷灰石/贝壳砂除氟剂
An opening in the earth's crust through which molten lava, ash, and gases are ejected.
火山地壳的开口，火中喷出熔岩、灰尘和气体
The Liuhe area belongs to the Archaeozoic high -g rade metamorphic belt,the outcropping rocks are mainly gray gneisses,supracrusta l rocks are rarely.
溜河地区属太古宙高级变质区,出露岩石以灰色片麻岩为主,表壳岩稀少。
Betty sells shells on the back of a red shell.
贝蒂在红色贝壳的背面上卖贝壳。
White shell beads used as wampum.
白色贝壳串珠用作贝壳串珠的白色贝壳小珠
shellfish with a hinged double shell,eg a mussel or clam
双壳贝类（如贻贝或蛤）
How Does the Sound of the Ocean Get Inside a Seashell?
到贝壳里“听海”？
A dark - gray to black, fine - textured igneous rock composed mainly of feldspar and pyroxene and used for monuments and as crushed stone.
辉绿岩一种贝岩，颜色深灰至黑，带有细微网纹，主要由长石和辉石构成，用作纪念碑或碎石块
The shells she sells are seashells, I'm sure.
我确定她卖的贝壳是海贝壳。
Having or forming a shell.
有贝壳的有或形成贝壳的
Wampum was made of seashells.
贝壳串珠是用海贝壳制作的。
A crumbly mixture of clays, calcium and magnesium carbonates, and remnants of shells, used as fertilizer for lime - deficient soils.
泥灰土一种由粘土、钙、镁碇酸盐和贝壳碎片构成的易碎混合物，用作缺乏碳酸钙土壤的肥料
A mass of strong, silky filaments by which certain bivalve mollusks, such as mussels, attach themselves to rocks and other fixed surfaces.
足丝某些双壳软体动物（如贻贝）用于将自身附着在岩石上和其它固定表面上的一团柔韧的丝
